Dell not turning On, orange light 💡 flashing

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[@user-rn3eb2jn5t]

Is that the led on the charging port which keeps blinking continuously even while the charger is plugged in and it doesn't turn on?

[@user-rn3eb2jn5t]

I have the same issue with a client's laptop been diagnosing it to find the exact fault whether it's battery, charger or board and what's the best way to resolve it.